R
Rajesh Narayanan
Researcher at Indian Institute of Technology Madras
Publications - 49
Citations - 630
Rajesh Narayanan is an academic researcher from Indian Institute of Technology Madras. The author has contributed to research in topics: Quantum phase transition & Phase transition. The author has an hindex of 15, co-authored 47 publications receiving 549 citations. Previous affiliations of Rajesh Narayanan include Asia Pacific Center for Theoretical Physics & University of Hong Kong.
Papers
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Journal ArticleDOI
Strong-randomness phenomena in quantum Ashkin-Teller models
Hatem Barghathi,Fawaz Hrahsheh,Fawaz Hrahsheh,Fawaz Hrahsheh,José A. Hoyos,Rajesh Narayanan,Thomas Vojta +6 more
TL;DR: In this paper, the N-color quantum Ashkin-Teller spin chain is considered and a general variable transformation that unifies the treatment of the strong-coupling regime is introduced.
Book ChapterDOI
Quantum phase transition in the spin boson model
TL;DR: In this paper, a detailed study of the low energy properties of the spin boson model (SBM), describing the dynamics of a spin 1/2 impurity coupled to a bath of independent harmonic oscillators, is presented.
Journal ArticleDOI
Strong-randomness infinite-coupling phase in a random quantum spin chain
TL;DR: In this article, the ground-state phase diagram of the Ashkin-Teller random quantum spin chain was studied by means of a generalization of the strong disorder renormalization group.
Journal ArticleDOI
Griffiths phase in the thermal quantum Hall effect
TL;DR: In this paper, the authors show that the Hall insulating regions of the phase diagram can support a sub-phase where the quasiparticle density of states is divergent at zero energy.
Journal ArticleDOI
Breakdown of Landau-Ginzburg-Wilson theory for certain quantum phase transitions
TL;DR: In this paper, the quantum ferromagnetic transition of itinerant electrons is considered and it is shown that the Landau-Ginzburg-Wilson theory described by Hertz and others breaks down due to a singular coupling between fluctuations of the conserved order parameter.